Gas-governor



(No Model.)

L. W. MARTYR & H. ELDRIDGE.

GASGOVERNOR. 110-503.350. Patented Aug. 15, 1893.

. A V, m% a Wifgzssas 6%0 4 I4 UNITED STATES PATENT OFFICE.

LEONARD W. MARTYR AND HILLIARY ELDRIDGE, OF HOUSTON, TEXAS.

GAS-GOVERNOR.

SPECIFICATION forming part of Letters Patent N 0. 503,350, dated August15, 1893.

Application filed February 11 1898- Serial No. 461.923- No model.)

To all whom it may concern.-

Be it known that we, LEONARD W. M ARTYR and HILLIARY ELDRIDGE, citizensof the United States, residing at Houston, in the county of Harris andState of Texas, have invented a new and useful Gas-Governor, of whichthe following is a specification.

This invention relates to gas governors; and it has for its object toprovide certain improvements in that class of gas governors which areemployed in connection with the gas-meters used for supplying buildings,and designed to accurately regulate the flow of gas according to thepressure that is required in any particular place.

To this end the main and primary object of the invention is to generallyimprove upon the construction of gas governors whereby the efiieientoperation thereof will be insured and without a needless multiplicity ofparts.

With these and many other objects in view which will readily appear asthe nature of the invention is better understood, the same consists inthe novel construction, combination and arrangement of parts hereinaftermore fully described, illustrated and claimed.

In the accompanying drawingsz Figure l is an enlarged vertical centralsectional view of a gas governor constructed in accordance with thisinvention. Fig. 2 is a detail plan of the upper valve stem guide. Fig. 3is a similar View of the lower guide. Fig. 4 is a detail in plan of thelegged guide cap.

Referringto the accompanying drawings:- A represents the governor casinghaving a lower interiorly threaded inlet neck a, adapted to be coupledto the gas-meter, and the laterally extending outlet neck a, to which iscoupled the house or distributing pipe. The governor casing A, isfurther provided at the upper end of the inlet neck a, with the inwardlyprojecting valve seat B, directly above which the said casing isextended into the outer and inner chamber or well walls 0 and C,respectively, which inclose there-between the circular mercury well orchamber 1) which is designed to be filled suiiiciently with mercury tofloat the devices to be herein described. The outer well wall 0, ishigher than the inner wall 0', and is exteriorly threaded as at c, toreceive the lower inner threaded end of the inclosing lid or cap D.

The inclosing lid or cap D, is preferably constructed with taperedsides, so as to hold the upper valve stem spider guide E, firmly inposition. The upper valve stem guide E, comprises a series of angularlydisposed arms 8, having angled or tapered ends 6', fitting the innersides of the lid or cap D, and having their extremities registeringwiththe shouldered seats 6 at the upper inner edge of the outer well wall C.The upper valve stem guide E, has a central guide opening e to receiveand guide the upper end of the reciprocating valve stem F. Thereciprocating valve stem F, is exteriorly threaded for a portion of itslength as atf, near its upper end, and carries abell-shaped valve G,working below and onto the inwardly projecting valve seat B", so as tocontrol the flow of gas through the inlet a. Thelower cxtremityof theralve stem f, below the valve thereon, works in the guide tube H, of thelower valve stem guide it, circular in cross section and exteriorlythreaded so as to be adjusted in position on the interior threads of theinlet neck a. The valve stem F, accommodates on the exterior threadedportion f, thereof, the upper inverted pressure cup I. The upperinverted pressure cup is designed to have the lower edges thereoffloated in the mercury in the well D, and said cup is held firmly inposition 011 the valve stem by means of the upper and lower taps J andJ, respectively, threaded onto the threads of the valve stem above andunder the upper inverted cup I.

The lower clamping tap J, is provided with an outer series of dependingrest legs K, and a concentric inner series of longer guide legs or stem75, which are designed to work inside of the central elongated passagetube or neck L, of the lower smaller inverted pressure cup M, the edgesof which are also floated in the mercury in the well D so that such cupis always floated out of contact with the inner wall 0', irrespective ofthe press ure contained within the casing. As illustrated, the passagetube or neck L, of the smaller inverted cup M, is much larger than thevalve stem F, which it encircles so that said tube or neck not onlyforms a guide embracing the guide legs or stems 75, to hold the lowercup in its proper position, but also forms a passage N, for the entranceof gas the valve stem on top of the upper cup asshown in dotted lines inFig. 1, for the purpose of opening and closing the valve G, ac-

cording to the pressure of gas needed.

In operation, the gas passes from the meter through the inlet a, by thevalve G, and out,

The regulating pressthrough the outlet at". ure of the gas passes upwardinto'the' lower cup M, which is thus placed under gas pressure, and alsothrough the tube L, into the upper cup I, so that a variance of pressurebeyond that which the governor is adjusted to be open under, will liftthe valve onto its seat or vice versa as the pressure might decrease. Itwill be apparent that by reason of the smaller size of the lower cup M,such cup will immediately respond to any variation in the pressure ofgas, so as to vary the valve opening, before the same pressure exertsitself on the upperlarger cup I, immediately above said lower cup, andthis is effectually secured, to render the governor exceptionallysensitive, by entirely freeing the lower smaller cup of the valve stem,in order to permit of a gas passage centrally therethrough whichcommunicates with the space inclosed by the up per larger cup. Thisconstruction possesses many advantages over the complicated gasgovernors which have separate andindependent passages to the separatecups, and cannot therefore attain the same degree of sensitiveness orquick response to thepressure of the gas, as the governor hereindescribed.

Changes in the form, proportion and the minor details of construction asembraced within the scope of the appended claims, may be resorted towithout departing from the principle or sacrificing any of theadvantages of this invention.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is-

1. In a gas-governor, the combination of th casing having a lowerinteriorly threaded inlet neck, an interior valve seat and an uppersingle mercury well in a line with and above the inlet neck, the outerwall of the well having an inner shouldered sea-t, an inclosing taperedor conical cover removably connected to the outer well wall, an upperspider valvestem guidehaving angled ends clamped into said shoulderedseat by the conical cover, an

f'exteriorly threaded valve stem guide adjustably engaging the threadsof the inlet neck and having an upwardly projecting guide tube, aWeighted valve stem having its upper and lower ends Working in the upperspider and lower guide tube respectively, a bellshaped valve attached tothe valve stem and working onto the interior valve seat, and separateinverted pressure cups floated in the s1n- .gle mercury well, one ofsaid cups being attached to the valve stem and the other lower cup beingentirely disconnected from the valve stem andthe upper cup and providedwith a central gas passage leading into said upper cup, substantially asset forth.

2. In a gas governor, the casing having an interior valve seat the inletand outlet necks and an upper mercury well, the valve stem carryingavalve, separate inverted pressure cups floated in said well, one of saidcups being attached directly to the valve stem and the other cup beingindependent thereof and provided with a central gas passage leading tothe former and a legged tap secured to the stem between the two cups andforming a spacing rest for the unattached cup, substantially as setforth.

3. In a gas governor, the casing having an interior valve seat an inletand an outlet neck and an upper mercury well, the valve stem guided insaid casing and provided with a valve and an exteriorly threaded portionat its upper end, an inverted pressure cup arranged on the upper end ofsaid valve stem and floated in said well, upper and lower taps threadedonto the threaded portionof the valve stem above and below said uppercup, the lower of said taps being provided with an outer series ofdepending rest legs and a concentric inner series of longer guide legs,and a lower smaller invert-ed pressure cup ar ranged inside of the uppercup and bearing on said rest legs, said lower cup being dis:

connected from the stem and provided with a central neck embracing thelower ends of said longer guide legs and forming a gas passage into theupper cup, substantiallyas set forth. In testimony that we claim theforegoing as our ownwe have hereto affixed our signatures in thepresence of two witnesses.

LEONARD W. MARTYR.

HILLIARY ELDRIDGE. Witnesses:

8.13. N. SCHNEIDER, D. J. CASTEEL.

